The present disclosure relates to dressings for wounds, methods of preparing thereof and methods of using thereof. Also, the present disclosure relates to a wound dressing comprising: bio-cellulose; and silver nanoparticles, wherein the concentration of silver nanoparticles is about 1000 �g/100 cm2 or less or about 1000 �g/ cm3 or less, and wherein the silver nanoparticles have a localized surface Plasmon resonance maxima of about 600nm to about 800nm.